Silver chloride

Silver, lead, arsenic, bismuth, antimony, selenium, and nickel are common impurities existing in copper anodes. Some impurities dissolved from the anodes can precipitate, if their concentrations in the electrolytic solution are above saturation levels. Some of these precipitates can settle down but some are floating slimes and can be a source of cathode contamination by their incorporation into the cathode 16. These floating slimes are amorphous and typically have compositions of Sb-As-O and…

for that, it never occurs free in nature. In addition, it must be stored under kerosene oil to prevent it from reacting with water molecules or other compounds in the atmosphere (Mukherjee). Physical properties of potassium include a soft, solid, silver-white metal that a person can cut with a dull knife. It has a melting point of sixty-three degrees Celsius, which is very low for a metal. In other words, it can melt over the flame of a candle. Its boiling point is 770 degrees Celsius and with…

Vinyl Record Materials Materials to used to make records have evolved and changed several times over the years. The earliest disc records from 1889-1894 were made of various materials including wax and. Rubber. Shortly after, a shellac based compound had been experiment with leading to it becoming standard. Each manufactures exact formula varied, but they typically coated records with a shellac (wax) resin Shellac The materials typically used to make for a shellacked disc where cardboard and…

transparent liquid with a grayish tint, when observing closely there are tiny black flakes floating within. After adding the NaCl to the AgNO3 the mixture turns into a milky color, the salt at the top begins to sink leaving silver chunks on the…

Lactate dehydrogenase was assayed according to the method of King (1965) [21]. Reagents required: 1. 0.1 M glycine buffer: 7.5 g of glycine and 5.85 mg of sodium chloride were dissolved in one litre of distilled water. 2. Buffered substrate: 2.76 g of lithium lactate was dissolved in 125 ml of glycine buffer containing 75 ml of 0.1 N sodium hydroxide solution. This was prepared just before use. 3. 0.4 N NaOH. 4. 5.0 mg of NAD+ was dissolved in 1.0 ml of distilled water just before use. 5.…

1. Which one of the following would make the most suitable catalyst in the decomposition of hydrogen peroxide (H2O2)? A. Carbon dioxide (CO2) B. Sodium chloride (NaCl) C. Magnesium oxide (MgO) D. Manganese dioxide (MnO2) 2. If the temperature of a reaction is decreased, what effect will this have on the rate of reaction? A. It will have no effect. B. The reaction will stop. C. The rate of reaction will increase. D. The rate of reaction will decrease. 3. Given the equilibrium reaction in a closed…

To begin with, we must agree that the when evaluating our perceptions of the world we find that they fall into three categories. External sensations that influence the senses, perceptions of the mind and thoughts constructed through the power of memory and imagination. Moreover, combinations of these ideas harmonise with each other to form our ideas of specific objects. For example, a lemon drizzle cake is described through the various sensations it imprints on us, such as its sweet taste and it…

Between 1916 and 1949 a few other companies offered colored shellac discs, including a blue-shellacked series from Columbia during the 1930s and chocolate colored pressings from a budget label “Perfect Records” prior to the 1930s. In 1949 when RCA Victor launched their 45-RPM format they began color-coding their records based on genre calcification. They classifications are as follows: Black Vinyl – Pop Pressings (Prefix 47) Green Vinyl – Country Music (Prefix 48) Red Vinyl - “Red Seal”…

Question 1 Part A: General Topic Properties of stainless steel • Corrosion resistant • Good tensile strength • Good low and high temperature service • Appearance • Hygienic • Has a respectable friction coefficient Corrosion resistant Stainless steel has a chromium-rich rust protective oxide thin film on the surface known as a passive layer, in which prevents corrosion by blocking oxygen diffusion to enter the passive layer and spreads rust into the internal material. As seen in Figure 1,…

In the course of recent years, the forensic sciences have made sensational scientific leaps forward (DNA writing, physical confirmation databanks as well as new scientific instrumentation) yet researches are expected to survey the commitment of such headways on the part and effect of scientific proof in criminal case preparing. The aim of this paper is to demonstrate the use of measurement instrumentation in a murder case. It emphasises the instruments that were used in the murder. For this…